1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef UI_VIEWS_REPEAT_CONTROLLER_H_ 6 #define UI_VIEWS_REPEAT_CONTROLLER_H_ 7 8 #include "base/callback.h" 9 #include "base/timer/timer.h" 10 11 namespace views { 12 13 /////////////////////////////////////////////////////////////////////////////// 14 // 15 // RepeatController 16 // 17 // An object that handles auto-repeating UI actions. There is a longer initial 18 // delay after which point repeats become constant. Users provide a callback 19 // that is notified when each repeat occurs so that they can perform the 20 // associated action. 21 // 22 /////////////////////////////////////////////////////////////////////////////// 23 class RepeatController { 24 public: 25 // The RepeatController takes ownership of this callback object. 26 explicit RepeatController(const base::Closure& callback); 27 virtual ~RepeatController(); 28 29 // Start repeating. 30 void Start(); 31 32 // Stop repeating. 33 void Stop(); 34 35 private: 36 // Called when the timer expires. 37 void Run(); 38 39 // The current timer. 40 base::OneShotTimer<RepeatController> timer_; 41 42 base::Closure callback_; 43 44 DISALLOW_COPY_AND_ASSIGN(RepeatController); 45 }; 46 47 } // namespace views 48 49 #endif // UI_VIEWS_REPEAT_CONTROLLER_H_ 50
